[meyer]

One video I saw of the sinking appeared to show a projectile (missile, drone, perhaps) striking the boat amidships. So it probably wasn’t gunfire.

[LonePalm]

Given the size of the explosion, I'm still leaning towards a small diameter bomb or, maybe a Hellfire.

SpyNavy

Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)